Malicious PDF — malware analysis report

Static analysis result for SHA-256 792ce6bac957da70…

MALICIOUS

PDF

76.6 KB Created: 2021-05-16 11:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c86873b0e4021a9b065eb391ba5dafd1 SHA-1: 23ec25dab6b1157032bb90561727eb2bb1fa4c20 SHA-256: 792ce6bac957da70ca47f1bf50a18f80ddc01ace79095085a8d9aa3349083b82
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://leonvi.ru/strik?utm_term=how+to+fix+paper+feed+on+epson+printer PDF link annotation
    • https://cdn.sqhk.co/wavagowew/QoIuVgj/88945531069.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/Sghjfij/free_computer_training_online_for_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/vixuwegijelo/ig1cqig/allen_tip_top_lawn_care.pdfIn PDF document text
    • https://cdn.sqhk.co/dowotovewi/hbjkzjc/90s_tv_show_quiz_buzzfeed.pdfIn PDF document text
    • https://degovemidim.weebly.com/uploads/1/3/4/0/134017519/cc646.pdfIn PDF document text
    • https://tivenudonokokom.weebly.com/uploads/1/3/0/9/130969369/bdd57b23d85d9c9.pdfIn PDF document text
    • https://vexalujonesudu.weebly.com/uploads/1/3/4/7/134738084/tilazo.pdfIn PDF document text
    • https://cdn.sqhk.co/jagapifa/EgijhjL/54989659497.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gidufuvez.epizy.com/brightness_driver_for_windows_10_hp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/659278a3-09df-435c-8e76-e5100fe5b465/12202614828.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/63058162454.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/50958987629.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/marathi_balgeet_video_3gp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98146e08-4b9c-4634-9a2a-91a2077c2289/in_the_shadow_of_the_sword_audiobook.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/zivofapigimuwirade.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/70207054410.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/german_children_s_books_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39897c89-9242-4857-a649-18ef300aea24/21_day_challenge_diet_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/free_symmetry_worksheets_4th_grade.pdfIn PDF document text
    • http://duletufazipup.epizy.com/pimikadowazakoxukizibazo.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/fda_guidelines_for_equipment_qualification.pdfIn PDF document text
    • http://julisanusifi.rf.gd/ziluweterobulumirakexa.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/assets_and_liabilities_spreadsheet_free.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED62 5124 bytes
SHA-256: 0e0132e30ec1b4ae3b606d40906bc67fba3750c0ee8055183c8058fff889687f
font_01_sfnt_off0000fef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF9 10956 bytes
SHA-256: 425a86e54eea09afae773dfb8dfd34e4c90b700987172908b5226f1edb04e42f

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